A cool video has emerged of nine-year-old Mikalah inventing a machine to help her little brother Samuel to stop sucking his thumb.
In the footage, shot in New South Wales, Australia, Mikalah explains with a song how she created a helmet with a leg that kicks Samuel's hand when he starts sucking his thumb.
Mikalah was able to create the helmet with the help of her father Jacob Strickling from the Make Science Fun YouTube channel.
